2010A&A...518A..33M


Query : 2010A&A...518A..33M

2010A&A...518A..33M - Astronomy and Astrophysics, volume 518, A33-33 (2010/7-2)

Radio polarimetry of 3C 119, 3C 318, and 3C 343 at milliarcsecond resolution.

MANTOVANI F., ROSSETTI A., JUNOR W., SAIKIA D.J. and SALTER C.J.

Abstract (from CDS):

We report new Very Long Baseline Array (VLBA) polarimetric observations of the compact steep-spectrum (CSS) sources 3C119, 3C318, and 3C343 at 5 and 8.4GHz. We analysed our VLBA observations and derived milliarcsecond-resolution images of the total intensity, polarisation, and rotation measure (RM) distributions. The CSS source 3C119, associated with a possible quasar, has source rest-frame RM values up to ∼10200rad/m2 in a region that coincides with a change in the direction of the inner jet. This component is located ∼325pc from the core, which is a variable source with a peaked radio spectrum. For 3C318, which is associated with a galaxy, a rest-frame RM of ∼3030rad/m2 was estimated for the brightest component contributing almost all of the polarised emission. Two more extended components were detected, that contain ``wiggles'' in the jet towards the southern side of the source. The CSS source 3C343 contains two peaks of emission and a curved jet embedded in more diffuse emission. It exhibits complex field directions close to the emission peaks, which are indicative of rest-frame RM values in excess of ≃6000rad/m2. The locations of the cores in 3C318 and 3C343 are unclear. The available data about mas-scale rest-frame RM estimates for CSS sources show that these have a wide range of values extending up to ∼40000rad/m2 in the central region of OQ172, and may be located at projected distances from the core of up to ∼1600pc, as in 3C43 where this feature has a rest-frame RM of ∼14000rad/m2. The RM estimates for the cores of core-dominated radio sources indicate that in addition to responding to an overall density gradient of the magneto-ionic medium, geometry, orientation, and modes of fuelling may also play a significant role. In addition to these effects, the high values of RM in CSS sources are possibly caused by dense clouds of gas interacting with the radio jets. The observed distortions in the radio structures of many CSS sources are consistent with this interpretation.

Abstract Copyright:

Journal keyword(s): polarization

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 3C 43 QSO 01 29 59.7696120312 +23 38 20.041393524           ~ 196 0
2 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 910 1
3 2C 396 QSO 04 32 36.50262174 +41 38 28.4497778     20.0     ~ 214 1
4 Mrk 1506 Sy1 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 1947 2
5 ICRF J052109.8+163822 Sy1 05 21 09.88596258 +16 38 22.0515459   19.37 18.84 18.480   ~ 818 1
6 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1422 1
7 4C 16.14 QSO 05 51 18.8518252416 +16 36 41.309901756     17     ~ 50 1
8 7C 055201.39+394824.00 QSO 05 55 30.80561419 +39 48 49.1649683     18.0 17.5   ~ 492 2
9 ICRF J090933.4+425346 Sy2 09 09 33.49714902 +42 53 46.4821036   19.98 19.42 18.220   ~ 486 0
10 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 6826 3
11 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 2922 2
12 3C 287 QSO 13 30 37.6960744824 +25 09 10.983105972   18.31 17.67     ~ 347 1
13 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4170 2
14 QSO B1404+286 BLL 14 07 00.39441712 +28 27 14.6901341   16.13 15.35 10.29   ~ 742 2
15 QSO B1445+101 QSO 14 45 16.46525080 +09 58 36.0727447   18.58 17.78     ~ 388 1
16 ICRF J145907.5+714019 Sy1 14 59 07.58390804 +71 40 19.8668093   17.24 16.78 17.2   ~ 479 1
17 3C 318.0 QSO 15 20 05.4773966208 +20 16 05.471959692   21.93 20.9     ~ 187 1
18 QSO B1524-136 QSO 15 26 59.44274001 -13 51 00.2643644     20.5     ~ 94 1
19 ICRF J163433.8+624535 Sy2 16 34 33.80623119 +62 45 35.8960467   21.06 20.61     ~ 212 1
20 3C 345 QSO 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1653 2
21 ICRF J182931.7+484446 Sy1 18 29 31.7809732968 +48 44 46.160168892   17.05 16.81 16.860   ~ 667 1
22 BWE 2249+1832 QSO 22 51 34.7277468096 +18 48 40.087264428   18.52 18.4     ~ 220 2
23 [FFS86] 3C 119 A Rad ~ ~           ~ 5 0
24 [FFS86] 3C 119 D Rad ~ ~           ~ 4 0
25 [FFS86] 3C 119 C Rad ~ ~           ~ 4 0
26 [FFS86] 3C 119 B Rad ~ ~           ~ 4 0

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2023.01.27-19:28:50

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